一个javascript脚本的问题!!!源文件如下

<td width="80%" height="25" id="idFavourable">
<script>
   function FavourableChecked(){
    if (document.form1.Favour_Check.checked=true){
       document.all("idFavourable").innerHTML = "<input type='text' name='Favourable' size='4'>";
             }
        else{
document.all("idFavourable").innerHTML = "<input type='text' name='Favourable' size='4' Disabled>";
      }
       }
     </script>

解决方案 »

  1.   

    <form name="form1">
      <table>
        <tr>
          <td width="20" height="25">
            <p align="center">
      <input type="checkbox" name="Favour_Check" value="ON" onClick=FavourableChecked()>
    </p>
          </td>
          <td width="100" height="25" nowrap>
            <p align="center">优惠金额:
      </td>
          <td id="tdFavourable" style="display:'none'">
            <input type='text' name='Favourable' size='4'>
          </td>
        </tr>
      </table>
    </form><script>
        function FavourableChecked(){
            if (document.form1.Favour_Check.checked==true){
                document.all('tdFavourable').style.display = "";
            }
            else{
                document.all('tdFavourable').style.display = "";
            }
        }
    </script>
      

  2.   

    <HTML>
    <HEAD>
    <TITLE> New Document </TITLE>
    <script>
       function FavourableChecked(){
        if (document.form1.Favour_Check.checked==true){
    document.form1.Favourable.disabled=false
                 }
            else{
    document.form1.Favourable.disabled=true
      }
           }
         </script>
    </HEAD><BODY BGCOLOR="#FFFFFF">
    <FORM name=form1><table border=1>
    <tr>
    <td width="2%" height="25">
     <input type="checkbox" name="Favour_Check" value="ON" onClick=FavourableChecked()>
    </td><td width="18%" height="25">
    <p align="center">优惠金额:
    </td>
    <td width="80%" height="25">
    <input type='text' name='Favourable' size='4'>
    </td>
    </tr>
    </table></FORM></BODY>
    </HTML>